Safety-stop for elevators



I (No Model.) I i v 2 Sheets -Sheet. 1.

I G. G. HALBLAUB.

SAFETY STOP FOR ELEVATORS. N0i.ss7,s98. Patented-Mar. 1.9, 1886.

no Model.)

G.O.HALBLA'UB.

' SAFETY STOP FOR ELEVATORS Patented Mar.- 9,1886.

N. PETERS, Pholo-Lilhognphon washin tnn, 0.0.

'NITED STATES PATENT OFFICE.

GEORGE C. HALBLAUB, OF CHICAGO, ILLINOIS.

SAFETY-STOP FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 337,398, dated March 9,1886. Application filed October 19, 1883. Serial No. 109,504. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE G. HALBLAUB, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Safety-Stops for Elevators; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming apart of this specification.

My invention relates to improvements in that class of stopping mechanism employed to check and stop too sudden descent of the cab or platform of passenger or other eleva-.

tors; and my improvement has forits objects, first, to furnish a compact device capable of ready insertion or application to the lower end of the stile of the elevator, so as to act as a guide for the same at such point; second, to provide a cheap, strong, and effective de vice which engages both sides of the guidestrip of the elevator-well, so as to arrest with great certainty the sudden downward movement of the cab upon the parting of the elevator-cable, or from other accidental causes. I attain such objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a perspective view of my improved device, looking from the rear; Fig. 2, a vertical section showing the safety dogs or catches in their up or engaged position. Fig. 3 is a similar view showing the same in their down or disengaged position. Fig. 4 is a front elevation, with parts in section, of an elevator-cab, showing the arrangement of my improved stop and its operating connections with the elevator-cable.

As shown in the drawings, the housing or casing consists of a base plate or flange, A, for engagement under the end of the cab stile or platform F, and vertical guide-jaws B B, which embrace the guide-strip G for the elevator, so as to form a guide for the lower end of the elevator-cab. At each side of the guide-jaws are formed chambers to receive the duplicate dogs or catches O, journaled at c, as shown, with their engaging ends pointing toward each other. These dogs or catches are lifted from the inclined position shown in Fig. 3 into a nearly horizontal position, as shown in Fig. 2, by being connected to a vertically-moving cross head or plate, D, provided with elongated inclined slots d, that receive pins 0 upon the dogs, as shown, the construction being such that in a downward movement of the head D the slots will tend to force the dog away from the guide-strip G of the elevator, and vice versa upon anupward movement of said head.

The movement of the plate D, with the consequent application of the safety-catches, may be controlled by the automatic governor usually employed upon passenger-elevators to prevent a too rapid descent of the same, or by means of the ordinary safety mechanism which applies the safety-check upon the parting of the elevator-cable, as represented in Fig. '4, in which E is the vertical rod by which motion is communicated to the crosshead D from thespring-operated cable-stirrup E through pivoted lever e.

My improved catch mechanism can be used in connection with either mechanism, the cross head or plate D being provided with a horizontal stem, d, to which is attached the vertical operating-rod E, extending to governing mechanism.

I prevent any rocking motion of the crosshead D by forming the portion of the stem d that passes through the guide-slot a of an elongated form, as shown indotted lines in Figs. 2 and 3, and by this means hold the dogs or catches, when in their down position, from any accidental engagement with the guide'strip G.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A safety-catch for elevators, consisting of a casing or housing having a flange portion, A, guidejaws B B, and pivoted dogs or catches O, with the cross-head D, receiving motion'from the safety mechanism of the elevator, substantially as described, and for the purpose set forth.

2. A safety-catch for elevators, consisting ofacasing or'housing having flange portion A, and guide-jaws B B, in combination with the pivoted dogs or catches G 0, having pins 0 c,

and the cross-head D, having inclined slots d gated form, moving in said slot, substantially d, substantially as described, and for the puras described, and for the purpose set forth. [0

pose set forth. In testimony whereof, witness my hand this 3. Inasafety-catch for elevators, essentially 1 29th day of September, 1883. 5 as herein described, the casing or housing for GEORGE O. HALBLAUB.

the stop dogs or catches, provided with an In presence of-- elongated guideslot, a, in combination with N. B. NASH, the cross-head D, having a stem, (1, of an elon- H. D. SMALLEY. 

